JPH0634256A - Heat exchanging device and freezing unit for container provided with heat exchanger - Google Patents

Abstract

PURPOSE:To increase a front surface area of an evaporator or an air-cooled condensor without increasing its thickness and to increase a heat exchanging capability. CONSTITUTION:A heat exchanger is divided into a plurality of heat exchangers 10A and 10B. Each of the divided heat exchangers 10A and 10B is inclined in respect to an air flow A and each of them is arranged in multi-stages with a spacing (d) in such a manner that a part of each of the heat exchangers 10A and 10B overlaps to each other. An air shielding plate 45 is arranged between each of the ends of the heat exchangers overlapped to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange device and a container refrigeration unit including the same.

[0002]

2. Description of the Related Art A conventional container is shown in FIG.
The container 1 has a rectangular parallelepiped shape, and a refrigeration unit 100 is attached to one end wall 2 of the container 1. By storing the cargo in the container 1 through a door (not shown) provided on the other end wall of the container 1 and operating the refrigeration unit 100, the air temperature inside the container 1 is kept within the range of -30 ° C to + 25 ° C. The container 1 is carried on a vessel, a truck, a railroad vehicle, etc., while being maintained at a temperature arbitrarily set by.

A schematic structure of the refrigerating unit 100 is shown in FIG. 5, where (A) is a front view, (B) is a sectional view taken along the line BB of (A), and (C) is a rear view. . The gas refrigerant discharged from the compressor 3 enters the water cooling condenser 5 or the air cooling condenser 4 and is condensed and liquefied there. The liquid refrigerant enters the electronic expansion valve 9 through the dryer 7 and the strainer 8 and is throttled there to undergo adiabatic expansion to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10, where it evaporates and vaporizes by cooling the air in the refrigerator blown from the evaporator fan 12 driven by the motor 11. Then, this gas refrigerant returns to the compressor 3 via the accumulator 13.

As shown by the solid arrow, the air inside the container 1 enters the suction chamber 15 from the suction port 14 and is urged by the evaporator fan 12, and is cooled in the process of passing through the evaporator 10. It returns to the inside of the container 1 through the air passage 16 and the blowout chamber 18, and is blown out from the gaps of the many T rails 43.

When the air-cooled condenser 4 is used, the motor
The condenser fan 6 is driven by 17. Then, after the temperature of the outside air is increased by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, as indicated by the dashed arrow,
The capacitor fan 6 is energized and discharged.

When the water-cooled condenser 5 is used, a water supply valve and a discharge pipe (not shown) are connected to the cooling water inlet 19 and the cooling water outlet 20 to open the water control valve 21. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 through the water pipe (not shown) from the cooling water inlet 19 and heats up there by exchanging heat with the gas refrigerant. The water is discharged from the cooling water outlet 20 through the water valve 21 and the discharge pipe.

Drain condensed on the evaporator 10 is dropped on the drain pan 22 and is passed through the drain pipe 23 to the drain port.
Emitted from 24.

The inner and outer partition walls 41 are fastened to the end wall 2 of the container 1 by flanges formed on the entire circumference thereof. A recess 42 is formed at the center of the lower part outside the inner / outer partition wall 41, and an intake chamber 15 is formed above the recess 42 inside the inner / outer partition wall 41.
However, an air passage 16 is formed on both sides, and an outlet chamber 18 is formed in the lower portion. An evaporator 10, an evaporator fan 12, etc. are installed in the suction chamber 15, and a compressor 3, an air-cooling condenser 4, a condenser fan 6, etc. are installed in the recess 42.

Reference numeral 25 is a control box, 26 is a solenoid valve for liquid injection for injecting and cooling a liquid refrigerant into the compressor 3, 27 is a 200V class power plug,
28 is a 400V class power supply plug, 29 is a power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air in the refrigerator that is sucked into the evaporator 10, 30 is an insertion port of a thermometer for checking the temperature sensor 31, 33 is a blown air temperature sensor for detecting the temperature of the air blown from the evaporator 10, 32 is an insertion port of a thermometer for checking the temperature sensor 33, and 34 is an outlet for detecting the refrigerant outlet temperature of the evaporator 10. A temperature sensor, 35 is an overheat prevention sensor, 36 is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air cooling condenser 4, and 38 is An inspection lid for inspecting the equipment in the suction chamber 15, 39 is a handle used when attaching and detaching the inspection lid 38, and 40 is a ventilation device.

[0010]

Since the conventional container refrigeration unit 100 is attached to the end surface of the container 1, its height and width are naturally restricted by the size of the container 1. Since the size of the container 1 is fixed and the load can be carried to the maximum extent, the space allowed for the refrigeration unit 100 is extremely limited. Therefore, the thickness of the refrigeration unit 100 should be reduced. Was desired.

However, since the conventional evaporator 10 has a cross-sectional shape as shown in FIG. 5 (C) because of its ease of manufacture, if the thickness of the refrigerating unit 100 is reduced, the air There is a drawback that the heat exchange capacity is reduced because the frontal area with respect to the flow is reduced.

[0012]

The present invention has been invented in order to solve the above-mentioned problems, and the gist of the first invention is to provide a fin in an air flow path blown by a fan. In a heat exchange device provided with a tube heat exchanger, the heat exchanger is divided into a plurality of pieces, each of the divided heat exchangers is inclined with respect to the air flow, and parts of the heat exchangers overlap each other. The heat exchange device is characterized in that it is arranged at intervals in a multi-step manner, and an air shield plate is provided between the respective end portions that overlap each other.

A second aspect of the present invention is characterized in that the heat exchange device is mounted on one end of a container, and the heat exchange device is arranged as an evaporator in an air flow path through which air inside the container circulates. In the unit.

The gist of the third invention is a refrigerating unit for a container, characterized in that the heat exchanging device is mounted on one end of a container and the heat exchange device is arranged as a condenser in a flow path of the outside air.

[0015]

In the present invention, because of the above structure, the front area of the heat exchanger is increased without increasing the thickness of the heat exchanger, and the air blown by the fan is divided into each heat exchanger. Flow in parallel.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. The evaporator 10 consists of a fin tube type heat exchanger, which is divided into a plurality of heat exchangers (two in the figure), and each of the divided heat exchangers 10A and 10B has an air flow A of about 30 °. The air passages 44 are inclined and at intervals d in multiple stages so that some of them overlap each other with respect to the air flow A.
It is arranged inside. A wind shield 45 is provided between the overlapping ends of the heat exchangers 10A and 10B. Other configurations are similar to those of the conventional one shown in FIGS. 4 and 5, and corresponding members are designated by the same reference numerals.

Thus, a part of the air in the refrigerator blown by the evaporator fan 12 flows between the fins of the heat exchanger 10A, and the rest flows between the fins of the heat exchanger 10B.
In this process, heat is exchanged with the refrigerant flowing in the tubes of the heat exchangers 10A and 10B to be cooled.

The heat exchangers 10A and 10B are tilted,
In addition, since the heat exchangers 10 and 10B are arranged at intervals in a multi-stage manner so as to partially overlap each other, the frontal area of each heat exchanger 10, 10B is increased by 1.85 times that of the conventional one. Thus, the heat exchange amount of the heat exchanger can be increased without increasing the width of the refrigeration unit.

The example in which the present invention is applied to an evaporator has been described above, but the present invention can be applied to an air-cooled condenser.

Further, as shown in FIG. 2, the heat exchanger can be divided into three, and the divided heat exchangers 10A, 10B and 10C can be arranged in three stages.

Further, as shown in FIG. 3, the heat exchanger is divided into four, and the divided heat exchangers 10A, 10B, 10C, 10
It is also possible to arrange D in two stages.

[0022]

According to the present invention, the heat exchanger is divided into a plurality of pieces, each of the divided heat exchangers is inclined with respect to the air flow, and a plurality of the heat exchangers are arranged at intervals so as to overlap each other. Since the windshield plates are provided between the overlapping end portions of the heat exchanger, the front surface area of the heat exchanger can be increased and the heat exchange capacity can be increased without increasing the thickness of the heat exchange device. Therefore, if this heat exchange device is used as an evaporator or a condenser, the thickness of the container refrigeration unit can be reduced, and the amount of cargo that can be stored in the container can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a schematic perspective view of a conventional container.

FIG. 5 shows a schematic configuration of a conventional refrigeration unit, (A)
Is a front view, (B) is a sectional view taken along the line BB of (A), and (C) is a rear view.

[Explanation of symbols]

 12 Juan 44 Air flow path 10A, 10B Split heat exchanger 45 Wind shield

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[Procedure amendment]

[Submission date] August 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. The evaporator 10 comprises a fin tube type heat exchanger,
This heat exchanger is divided into a plurality (two in the figure), and each of the divided heat exchangers 10A and 10B has an air flow A of about 3
They are inclined at 0 ° and are arranged in the air flow path 44 in a multi-step manner at intervals d so as to partially overlap each other with respect to the air flow A. And each heat exchanger 1
A wind shield 45 is provided between the overlapping ends of 0A and 10B. Further, one end of each heat exchanger 10A, 10B is in close contact with one inner wall forming the air flow path 44, and a predetermined gap is formed between the other end and the other inner wall forming the air flow path 44, The clearance is about 20 when the total width of the air passage 44 is 100. Other configurations are shown in FIGS.
It is similar to the conventional one shown in FIG. 3, and corresponding members are designated by the same reference numerals.

Claims (3)

[Claims] 1. A heat exchange device in which a fin tube type heat exchanger is arranged in an air flow path blown by a fan, wherein the heat exchanger is divided into a plurality of parts, and each divided heat exchanger is It is inclined with respect to the air flow and is arranged in multi-tiered intervals with some of them overlapping each other,
A heat exchange device, characterized in that a wind shield plate is provided between the overlapping ends. 2. A refrigeration unit mounted on one end of a container, wherein the heat exchange device is arranged as an evaporator in an air flow path in which air inside the container circulates. 3. A refrigerating unit for a container, which is attached to one end of a container, and wherein the heat exchange device is arranged as a condenser in a flow path of outside air.